who here uses digital mixers?

I've run out of ins on my RME fireface 400 and am considering what I can rig up via the adat?

2 options at the mo -

a) Old Apogee AD-8000 with Adat card = 8 ins (and good warm sound)

b) old Yamaha O1v with Adat card = more ins, but prob worse sounds than the Apogee.